Main Battery Coolant Tank

Tesla Roadster — Main Battery Coolant Tank (OEM)

Preserve peak thermal performance of the Roadster’s traction battery and drive system with the OEM main battery coolant tank. Sourced from the original vendor—this is not an aftermarket reconstruction—built to Tesla’s original fit and function for reliable, long-life service.  These are original NOS parts found in old inventory bins at Tesla, obsolete and no longer in production, and now made available for owners.

The Roadster’s ~1000-lb multi-cell Li-ion pack depends on a closed-loop liquid circuit to pull heat away during charge and discharge.
This tank provides a clear visual coolant level and maintains proper headspace for circulation, helping keep the pack and power electronics within their optimal temperature window to avoid
performance roll-off and thermal stress.

• Genuine OEM — sourced from the original supplier for exact Roadster fitment.
• Correct geometry & ports — drop-in replacement with factory hose routing and cap interface.
• Transparent reservoir — quick at-a-glance fill-level verification.
• Thermal protection — supports battery/PEM temperature stability under spirited driving and fast charging.
• Service-friendly — compatible with Roadster bleeding/fill procedures.